diff --git a/pkgs/development/compilers/gwydion-dylan/binary-builder.sh b/pkgs/development/compilers/gwydion-dylan/binary-builder.sh
deleted file mode 100644
index a0e71c02ab93..000000000000
--- a/pkgs/development/compilers/gwydion-dylan/binary-builder.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-source $stdenv/setup
-
-set -e
-
-mkdir -p $out
-cd $out
-tar zxvf $src
-mv ./usr/local/* .
-rm -rf ./usr
diff --git a/pkgs/development/compilers/gwydion-dylan/binary.nix b/pkgs/development/compilers/gwydion-dylan/binary.nix
deleted file mode 100644
index 0ac942d14b89..000000000000
--- a/pkgs/development/compilers/gwydion-dylan/binary.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{stdenv, fetchurl}:
-
-stdenv.mkDerivation {
-  name = "binary-gwydion-dylan-2.4.0";
-  builder = ./binary-builder.sh;
-  src = fetchurl {
-    url = http://www.gwydiondylan.org/downloads/binaries/linux/x86/tar/gwydion-dylan-2.4.0-x86-linux.tar.gz;
-    md5 = "52643ad51a455d21fd4d5bf82d98914c";
-  };
-}
diff --git a/pkgs/development/compilers/gwydion-dylan/builder.sh b/pkgs/development/compilers/gwydion-dylan/builder.sh
deleted file mode 100644
index ea2e54243990..000000000000
--- a/pkgs/development/compilers/gwydion-dylan/builder.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-source $stdenv/setup
-
-export DYLANDIR=$dylan
-export DYLANPATH=$dylan/lib/dylan/2.4.0/x86-linux-gcc
-configureFlags="--with-existing-runtime=$dylan/lib/dylan/2.4.0/x86-linux-gcc"
-export LD_LIBRARY_PATH="$dylan/lib/dylan/2.4.0/x86-linux-gcc:$LD_LIBRARY_PATH:$boehmgc/lib"
-
-genericBuild
diff --git a/pkgs/development/compilers/gwydion-dylan/default.nix b/pkgs/development/compilers/gwydion-dylan/default.nix
deleted file mode 100644
index 7c00e65d7ccd..000000000000
--- a/pkgs/development/compilers/gwydion-dylan/default.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-{stdenv, fetchurl, dylan, boehmgc, perl, flex, yacc, readline}:
-
-stdenv.mkDerivation {
-  name = "gwydion-dylan-2.4.0";
-  builder = ./builder.sh;
-  src = fetchurl {
-    url = http://www.gwydiondylan.org/downloads/src/tar/gwydion-dylan-2.4.0.tar.gz;
-    md5 = "7ed180bf4ef11e8e8da3bd78b45477a8";
-  };
-
-  inherit boehmgc dylan perl;
-  buildInputs = [boehmgc dylan perl flex yacc readline];
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7852f255d42b..10fba3f3c6b3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2730,10 +2730,6 @@ let
   cython = pythonPackages.cython;
   cython3 = python3Packages.cython;
 
-  dylan = callPackage ../development/compilers/gwydion-dylan {
-    dylan = callPackage ../development/compilers/gwydion-dylan/binary.nix {  };
-  };
-
   ecl = callPackage ../development/compilers/ecl { };
 
   eql = callPackage ../development/compilers/eql {};